Electric switch.



No. 860,432. PATENTED JULY 16, 1907.

J. M. A-NDBRSIBN.

ELECTRIC SWITCH. APPLIUATION FILED OUT 13 1905 2 SHEETS-SHEET 2.

ITED STATES FftTENT OFFICE.

JOHAN M. ANDERSEN, OF BOSTON, MASSACHUSETTS, ASSlGNOR TO ALBERT AND J. M.

ANDERSON MANUFACTURING COMPANY, OF BOSTON, .\I.-\SSAUHUSETTS, A CORPORA- TION OF MAINE.

ELECTRIC SWITCH.

Specification of Letters Patent.

Patented July 16, 1907.

Application filed. October 13,1905. Serial No. 2 82,584-

To all 'ivhom it may concern:

Be it known that I, JOHAN M. ANnnnssN, a citizen of the United States, residing in Boston, in the county of Suffolk and State of Massachusetts, have invented an Improvement inElectric Switches, of which the follow ing description, in connection with the accbmpanying drawings, is a specification, like letters on the drawings representing like parts.

g the claims at the end of this specification.

Figure 1 is a plan view of one form of switch embodying this invention. Fig. 2, a side elevation of the switch shown in Fig. Fig. 3, a detail in section on the line 3-3, Fig. 2. Figs. 4 5 and 6, details to be referred to. Fig. 7, a plan of another form of switch, and Fig. 8, a side elevation 01' the switch shown in Fig. 7.

In Figs. 1 and 2, I have shown the invention as embodied in a three pole switch, which is electrically connected at the back or rear of the switch board or supporting base a. The three pole switch shown in Fig. 1 is provided with three blades or movable members b of like construction, which are pivoted at one end. to fixed uprights or arms 0 fastened as by a pin d to a terminal block or piece e, which is secured to the base or board a by nuts f engaging a threaded-rod or screwy secured to or forming part of the terminal piece 0. The

Zblade b is mounted to turn on the pivot pin or shalt h,

and isheld in frictional engagement with the arms c by washers 2 and nuts 3. Each blade b cooperates with tachedto it a handle 15'.

contact arms 6 fastened as by a pin 7 to a block or piece 8 provided with the threaded rod or screw 9 which extends through the base a and is engaged by the nut 10. The contact arms 6 are made substantially long to permit the blade I) to make iull contact with said arms and leave a substantial space between the blade in its closed i position and the base a, for a purpose as will be described. The upper ends of the arms 6 may be provided with longitudinally extended slots 12 to impart spring action to the said arms. In the present instance, thethree blades b have their free ends joined by a tie or cross bar 14 of insulating material, which has at- Switches or circuit controllers of the character above described, frequently have co; operating with them suitable fuses m, which may be of any suitable construction and which are detachably secured to the base a. The use m, herein shown as the inclosed type, is provided at its opposite ends with terminals 16, 17', which cooperate with contact arms 19, 20 secured as by pins 21, 22 to terminal pieces or blocks 23, 24. The terminal 24 is provided with a threaded rod or stud 25 extended through the base a and secured by the nut 20, and the terminal 23 is provided with an upright arm 27 from which extends a finger 26, which latter extends between the contact arms (S of the terminal 8 and engages with the inner sides of said arms to make a substantially extended contact with the same and thereby el'i'ect an ellicicnt connection with said contact arms to carry a substantially large current in the proper manner. The linger 28 may and preferably will be dctnchably secured to the arms 6 by a screw ill) and nut 31 extended through said arms (3' as represented in Fig. l, the said screw and nut permitting adjustment of the arms to compensate for lingers 28 of different or varying thicknesses. It will thus be seen, that the linger 28 of the terminal piece or block 23 is firmly clamped between the arms (3 and makes a substantially extended contact with both. The finger 28 of the terminal block or piece 23 practically form a filling block for the lower portion of the space between the contact arms 6 and acts as a stop to limit the movement or the blade 1; into the space between said arms, the said finger having a nub or projection 50, which is engaged by the blade b.

As represented in Figs. 1 and 2, the circuit connections are made at the back or rear oi the base or switch board a and or this purpose the studs or thr aded rods g, 25 are provided with the nuts 32, 33.

In Figs. 7 and S, the circuit connections are made at the lronl of the ba e or board a, and for this purpose, the fuse terminal 35 has secured to it as by the screw 36 a line Lerminul 37, and the pivot-supporting a ms 0 have secured in ihcm a terminal block or piece 38, which is like the terminal block or pic 23, and has secured to it a line terminal 40 instead of the Contact lingers 19, the terminal 38 having a linger 28 which is extended between the pivot supporting arms 0 and secured thereto by the screw 30 and nut 31. It will thus be soon, that in the front-connected switch represcnt cd in Figs. 7 and 8, the circuit wires, not shown, are c nnected at the iront oi the board or base a to the terminals d7, 40, and in the back-connected switch represented in Figs. 1 and 2, the circuit res (not shown) are connected to the screw-rods a, 25 of the terminals c, 24.

In both iorins of switches, the terminal block or piece 23 serves as a front stop for the switch blades, so that the handle 15 in both forms 01 switches is separated lrr the board a the same distance, which perruits the some blade or knife-contact arms 6 to be used in switches having the form of fuse m herein shown or having other forms, or in switches in which the fuse is omitted, thereby standardizing th-e said blade contact arms.

ltwill be seen that the blocks or pieces e, 8, and 24 I having the threaded rods or stems g, 9, 25 are of like construction, and therefore the block or piece e having the rod 9, is a standard piece for both forms of switches and may be used in connection with the pivot-supporting arms and with the blade contact arms 6 of both switches and with the fuse terminal arms of the back-connected switch, the threaded rod 9 being made of a standard length, represented by the length employed for making connection with the circuit wires, which standard length is shortened to adapt the block or piece for use with the blade contact arms 6 of both porting armsc of the rent-connected switch.- The switch blades are a standard for both forms of switches. The terminal blocks for the frontconnected switch are a standard therefor; When the standard terminal block 23 is used with the pivot-supporting arms "c, the nub 50 is removed, and the finger 28 thereby shortened to permit the blade I) to turn on its pivot.

it will thus be seen that with five standard parts,

i to witthe block or piece 6 provided with the threaded rod 9, the pivot-supporting arms 0, the blade contact arms 6, the filling block or terminal 23, and the line 3 terminal 35, a large variety of switches may be made at a minimum cost and each of a maximuincfficiency. The standard parts referred to may be used in front or back-connected single, double or triple pole switches, with or without fuses, and enables the fuses when em- 4 ployed, to be placed at either end of the switch, that is, the fuse contact arms 19 maybe attached to the block or piece 23 and the latter connected with the blade contact arms 6 or with the pivot-supporting arms 0.

Claims. v

1. In a switch or circuit controller, in combination, blade supporting arms, a blade pivoted thereto, contact arms with which the free end of said blade cooperates, a block to which said contact arms are attached, a terminal block separate from the block towhich the said contact 5 arms are secured and provided with a Linger extended between the said bladecontact arms to make contact therewith, and means to detacliably secure said finger to the blade-contact arms, substantially as described.

2. In a switch or circuit controller, in combination, a 5 movable member, contact arms cooperating therewith, and a terminal. piece having an upright arm and a finger extended from said upright arm substantially at right angles thereto, said finger extending between said contact arms and making electrical connection therewith, substantially 6 as described.

3. In a switch or circuit controller, -a terminal piece having an upright arm and a finger-extended from said upright arm substantially at right angles thereto, substantially as and for the purpose specified.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses.

- JOHAN M. ANDERSEN.

' Witnesses JAS. H. CHURCHILL, J. MURPHY. 

